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Location Japan, Shizuoka
Central coordinates 137o 35.00' East  34o 43.00' North
IBA criteria A4i, A4iii
Area 7,800 ha
Altitude 0 - 5m
Year of IBA assessment 2004

Wild Bird Society of Japan

Site description Enshunada is seaside area that extends from Omaezaki of Shizuoka Prefecture to Iragomisaki of Aichi Prefecture into which the Tenryugawa river and Ohigawa river flow. Along the coast, monotonous sandy beaches with some dunes continue. Colonies of Little Tern and spawning grounds of loggerhead turtle are found on the beach. Hamanako is a brackish water lake. The area of the lake is 65 km2 and its circumference is 114 km. The lake has an average depth of 4.8 m and has four water areas, namely Hosoeko, Inohanako, Matsumigaura and Shonaiwan. As the lake is known to be a spawning ground of fish and the habitat of fry of many kinds, fishing is a very popular activity here. Lately, the regional development through tourism has been promoted and people enjoying fishing, marine sports and shellfish gathering utilize the area.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Falcated Duck Mareca falcata winter  2004  present  A4i  Near Threatened 
Common Pochard Aythya ferina winter  2004  present  A4i  Vulnerable 
Greater Scaup Aythya marila winter  2004  present  A4i  Least Concern 
Little Tern Sternula albifrons breeding  2004  present  A4i  Least Concern 
A4iii Species group - waterbirds winter  2004  min 20,000 individuals  A4iii   


IUCN habitat Habitat detail Extent (% of site)
Wetlands (inland) Coastal lagoons; Sand dunes and beaches  -

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Lake Hamanako, Enshunada. Downloaded from on 27/10/2016

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